Dumping grate



April 1 1935- G. L BRIDGE 1,997,764

DUMPING GRATE Filed Sept. 8, 1934 G h nyn eangez, Mk7 e Patented Apr. 16, 1935 KU'NITED STATES PATENTCOFFICE George L.,Bridge, Clayton, Mo. Application September 8, 1934, Serial No. 743,176

2 Claims.

; This invention relates to stove grates and particularly to that type which are generally termed duplex grates.

This application is a continuation in part of my application Serial No. 676,085, filed June 16,

The ordinary duplex grates of conventional .construction comprise a plurality of grate bars which are adapted'to be turned or oscillated so as to permit the load of the grate to fall downwardly between the grate bars into the ash pit. An object of this invention is to provide a swinging frame which supports the bars with means which may be readily manipulated to permit the supporting frame with the grates to swing downwardly in order to dump the entire load on the grate bars and to permit the return of the frame to its normal position, in combination with novel mechanism for holding the frame in normal position and to release the frame for dumping.

Other objects will be apparent from the following detail description, taken in connection with the accompanying drawing, in which- Fig. 1 is ahorizontal section through the stove approximately on the plane of the grate bars.

Fig. 2 is a vertical section approximately on line 2-2, Fig. 1.

Fig. 3 is a section on line 3-3, Fig. 1. Fig. 4 is a detail perspective view of the grate rest and release. I

A horizontally disposed stationary frame I is arranged inside of a stove adjacent the lower end of the fire pot, and supported by some suitable means, not shown in the drawing. Grate bars 2 and 3 are supported in a swinging frame 4 by means of trunnions on each end of the grate bars, 5 designating the rear trunnions, 6 designating a short front trunnion on thegrate bar 3, and l designating a long trunnion on the front 0 of the grate bar 2. The trunnions 5 rest in bearings 8 on the rear end of the frame 4 and the trunnions 6 and I in bearings 9 on the front end of theframe 4, the bearings 9 being provided with a retaining plate Ill. The end of the trun- 45 nion 5 of the grate bar 2 is also journalled in a hanger II at the rear end of the frame I and the trunnion 1 is journalled in a hanger l2, which is integral with the front wall l3 of the stove. The end of the trunnion I also passes through 50 a suitable opening in a cover plate l4 and its end is shaped to receive an operating lever or shaker, as is well understood in the art.

Toothed members I5 and I6 that mesh with each other are connected to the front trunnions 55 6 and of the grate bars, as best shown in Fig. 2,

so as to transmit the oscillating movement of the actuated grate bar 2 to the grate bar 3.

It will thus be seen that the frame 4 together with the grate bars is mounted for oscillation with the trunnions of the grate bar 2 acting as 3 pivots.

A grate bar and release, comprising an elongated bar I1, is supported by the front wall l3 and a rear wall I8 of the stove, and parallel to the frame 4 and adjacent its outer edge when the 10 frame 4 is in normal position. The bar I! has two notches H] to accommodate lugs 20 on the outer edge of the frame 4.

The bar I1 is supported for horizontal sliding movement and is resiliently held in position by a 5 spring 2|. Its front end is provided with a knob 22 for manual engagement. The arrangement is such that the bar Il may be moved forwardly by means of the knob 22 when it is desired to dump the grate. By pulling the knob 22 forwardly the 20 lugs 20 register with the notches l9, thus releasing the frame 4 and permitting it to swing downwardly while it is pivotally supported on the frame I by the trunnions 5 and l of the grate bar 2. 25

A bevelled ear 23 is positioned adjacent one of the notches I9 and the arrangement is such that as the frame 4 is swung upwardly the adjacent lug 20 engages the ear 23 pressing the bar H forwardly against the action of the spring 2| and 30 thus bringing the notches |9 into registry with the lugs 20. As soon as the frame 4 has been moved upwardly far enough for the lugs 20 to clear the notches IS, the spring 2| causes the bar to return to its normal position, the frame 4 35 is manually released and comes to rest with the lugs 2|] engaging the top of the bar ll, thus supporting the frame 4.

For convenience and appearance a hinged door 24 covers the end of the trunnion I and the front end of the bar I1.

The frame 4 may be returned to normal position by means of a shaker member attached to the end of the trunnion 'I. This function results by reason of 2. lug 25 on the rear end of the frame 4, and a lug 26 on the plate In, which lugs are in the path of the grate bars when they are rotated. That is to say, after a partial revolution in either direction, corners of the grate bars strike the lugs 25 and 26, prohibiting further movement of the bars relative to the frame and permitting the frame to be moved by the shaker member.

It will be obvious, from the foregoing description, that the invention accomplishes its purso proportioned and positioned as to permit said lug to rest upon the upper side of said member and thereby support the frame, having a notch in its edge adjacent the frame to permit the lug to pass therethrough when the said member is shifted, and having a bevelled surface underneath and adjacent the notch whereby when the frame is shifted upwardly from dumping position the lug will engage the bevelled surface to shift the mem her and permit the lug to pass through the notch.

2. A grate comprising a pivotally supported frame provided with means for supporting fuel, and having a lug projecting from the outer edge thereof, in combination with an elongated member slidably mounted on a stationary support, arranged parallel to and adjacent the outer edge of the frame when the frame is in normal position, so proportioned and positioned as to permit said lug to rest upon the upper side of said member and thereby support the frame, havinga notch in its edge adjacent the frame to permit the lug to pass therethrough when the said member is shifted, having a bevelled surface underneath and adjacent the notch whereby when the frame is shifted upwardly the lug will engage the bevelled surface to shift the member and permit the lug to pass through the notch, and a spring associated with the member and positioned and adapted to move the member and to yieldingly hold the member in a position to support the frame.

GEORGE L. BRIDGE. 

